container-core/src/main/java/com/yahoo/language/provider/DefaultLinguisticsProvider.java


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34

// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.language.provider;

import com.google.common.base.Supplier;
import com.google.common.base.Suppliers;
import com.yahoo.component.annotation.Inject;
import com.yahoo.container.di.componentgraph.Provider;
import com.yahoo.language.Linguistics;
import com.yahoo.language.opennlp.OpenNlpLinguistics;

/**
 * Provides the default linguistics implementation if no linguistics component has been explicitly configured
 * (dependency injection will fallback to providers if no components of the requested type is found).
 *
 * @author bratseth
 */
@SuppressWarnings("unused") // Injected
public class DefaultLinguisticsProvider implements Provider<Linguistics> {

    // Use lazy initialization to avoid expensive (memory-wise) instantiation
    private final Supplier<Linguistics> linguisticsSupplier;

    @Inject
    public DefaultLinguisticsProvider() {
        linguisticsSupplier = Suppliers.memoize(OpenNlpLinguistics::new);
    }

    @Override
    public Linguistics get() { return linguisticsSupplier.get(); }

    @Override
    public void deconstruct() {}

}